Technical data

SightLine Applications Command and Control

MaxWide s16 Maximum target width (pixels) (-1 = not set)

MinHigh s16 Minimum target height (pixels) (-1 = not set)

MaxHigh s16 Maximum target height (pixels) (-1 = not set)

MaxThresh u8 Maximum automatic threshold (0 to 255 grey levels). A lower level

results in higher sensitivity, but more false detects.

NFramesBack u8 Number of frames to go back in time to compare frames in MTI

difference mode. (1 to 15). Default 15.

MergeRadius u8 Maximum distance between targets at which they can be merged

into a single target. (0 to 255 pixels) 0 = automatic, default = 0,

typical is 10 to 25.

MergeDirTol u8 Maximum angle heading difference between targets at which they

can be merged. (0 to 180 degrees). Default = 45 degrees.

NWatch u8 Number of frames to watch a “blob” before it moves to “peak” state.

PkNWatch u8 Number of frames to watch a “peak” before it moves to “track”

state.

SuspScore16 s16 “Blob” with a “suspicious” score above this value are not eligible to

move to “peak” state. Default 6554.

BgTimeConst u16 Time constant (in frames) at which frames are averaged into the

background model. At the default value of 600, the background will

mostly be replaced after about 20 seconds.

BgEdgePenalty6 u8 Penalty to apply to edges in background model mode. Typical

values are 0 (no edge penalty) to 64 (full edge penalty). Default 64.

BgResetConf u8 Reset background model if registration confidence falls below this

value for BgResetFrames frames. 0 to 100, default 60

BgResetOff u8 Reset background model if the registration column or row offset

exceeds this value for BgResetFrames frames. 0 to 255, default 100

BgResetAng u8 Reset background model if the registration angle in degrees exceeds

this value for BgResetFrames frames. 0 to 180, default 5

BgResetFrames u8 Reset background model if the above conditions are met for this

number of consecutive frames. 0 to 255, default 3. Allows for

recovery from temporary bad frames or temporary large motion, but

resets when there is a large amount of motion.

BgWarpConf u8 Warp the background model if registration confidence falls below

this value for BgWarpFrames frames. 0 to 100, default 80

BgWarpOff u8 Warp the background model if the registration column or row offset

exceeds this value for BgWarpFrames frames. 0 to 255, default 50

BgWarpAng u8 Warp the background model if the registration angle in degrees